<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<input type="text" id="i1" placeholder="请输入0-100之间的整数">
<input type="button" value="猜一猜" onclick="f()">
<div>结果:<span></span></div>
<script>
    //得到0-100随机数
    let x = parseInt(Math.random()*101);
    let count = 0;
    function f() {
        count++;
        let i1 = document.querySelector("#i1");
        let s = document.querySelector("span");
        if(isNaN(i1.value)){
            s.innerText="输入错误";
            return ;
        }
        if(i1.value>x){
            s.innerText = "猜大了";
        }else if(i1.value<x){
            s.innerText = "猜小了";
        }else{
            s.innerText = "恭喜你第"+count+"次猜对了！";
            count = 0;
            x = parseInt(Math.random()*101);
        }
    }
</script>
</body>
</html>